Chargers wide receiver Eddie Royal was hospitalized Saturday after experiencing shortness of breath following a catch during a training-camp practice.

The sixth-year NFL veteran suffered a bruised lung and concussion, the Chargers announced Saturday afternoon. All other initial test results have been negative.

Royal jumped for a pass in a team drill and landed hard on his back about 11 a.m. He met with head athletic trainer James Collins and walked under his own power toward the athletic trainer's room. Halfway there, on the east practice field, Royal stopped and knelt to the ground where he underwent treatment, appearing to receive oxygen. Royal also was seen coughing up blood.

An ambulance on-scene met Royal, 27, on the field. He was strapped to a gurney, lifted into the ambulance and, about 15 minutes after the fall, shuttled to a nearby hospital.

"He had a little bit of a hard time breathing, so we're going to take him to a hospital to check him out," coach Mike McCoy said after practice. "That's all I got right now. I can't tell you anymore. I don't know a whole lot about it."

Practice continued as Royal was treated with teammates monitoring the situation from afar. Some approached to offer support but were instructed to back away so Royal could have needed air.

Cornerback Shareece Wright covered Royal on the play. This was the latest of injuries Wright has recently seen up close, as he was the player in coverage when Danario Alexander suffered a season-ending knee injury Aug. 6 and Malcom Floyd strained his knee on Aug. 12.

"I didn't know how serious it was, but (Royal) hit his back pretty hard," Wright said. "It was an awesome catch. I don't know how he caught it, but he did."

"Phenomenal catch," safety Eric Weddle said. "He was about 10 feet in the air. He just fell straight down on his back. Hopefully, he'll be OK. He's tough."

Royal, in in his second season with the Chargers after spending his first four in Denver, has suffered multiple concussions over the past two years, beginning with one in December 2011. Until Saturday, he had stayed healthy in training camp, going from the starting slot receiver to seeing heavy first-team reps outside because of injuries.

Chargers wide receivers gathered Saturday after practice.

Second-year veteran Mike Willie led the group in prayer, asking for the speedy recoveries of Royal, Alexander and Floyd. Floyd was at practice and part of the prayer group. He was among the teammates who said they planned to meet Royal in the hospital.

Wide receiver Robert Meachem called the number of August injuries to Chargers receivers "mind boggling."

"It's a very tough time as a group," Meachem said. "Like coach says all the time, you've got to take it one day at a time. You never know what God's plan is."